Spoilers
“Radio”
Lukas and Kennedy went out of the silo and attempted to go to Silo 17. They did not make it. However, the surprise was that they were apparently shot. At the end of the episode, it sounded as if Lukas and Kennedy survived and reported that he had the kids that he went to retrieve. That still makes me question the entire thing. It sure sounded like bullets (probably from drones) when Lukas and Kennedy lost contact.
Because of this apparent failure of this mission, there was an attempt to blow up judicial in a way to try and stop the poison gas. Juliette struggled with the decision as she realized that whatever plan she decided upon would lead to death for hundreds of people.
Everything got called off when we discovered that Lukas and Kennedy were not dead (or so we think).
There was some big developments between Sims and Camille as they had a huge conflict about Sims’s actions. Camille is feeling the pressures of leading the IT. The Algorithm seemed to be manipulating her too.
Then we see the creation of the silos from the flashback time. We discovered that billionaire Per Stensen is behind the construction of the silos in Georgia.
Things are getting wilder as the the season is on its way to a conclusion.